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What I need is a way for users to send me bitcoins using http://blockchain.info/api/
I need it so that each person that sends me bitcoins are kept for their username entered during a checkout process. I'm somewhat familiar with PHP but not this experienced to make sure I'm doing this right, and am about to pull my hair out.
To sum it up.
Product for sale -> User buys it, fills out their information -> blockchain's API generates a unique bitcoin address for them, to which they send the total to -> email is sent out to a specific email address(s) of their confirmed/verified bitcoin sent purchase
I also need a very simple (if possible) PHP simple calculator to convert USD to bitcoins last sell rate, which I already have the code for the real time bitcoin value, I'm just not sure if it's possible to do simple division in PHP.
None of this can be done in Java, Flash. It needs to be in PHP only. If the budget needs to go up, let me know; I need this done ASAP.
P.S. There is no commercial shopping cart, this is mostly done custom.